Piping length measuring device



July 16, 1957 MASAZO TANGO 2,799,087

PIPING LENGTH MEASURING DEVICE Filed NOV. 18. 1954 3 Sheets-Sheet l 23 J 3 f3 '5 C 2 I l j;

I: 5 5 INVENTOR 5 3 IMsnzo TANGO WMM,LM%LPM ATTORNEY;

y 1957 MASAZO TANGO 2,799,037

PIPING LENGTH MEASURING DEVICE Filed Nov. 18, 1954 3 Sheets-Sheet 2 Nnsazo Zia/s0 y /4 m zzvmvrox By MM MMPLMX ATTORNEYS July 16, 1957 MASAZO TANGO 2,799,

PIPING LENGTH MEASURING DEVICE Filed 18, 1954 3 Sheets-Sheet 3 INVENTOR Mnsnzo Ewen ATTORNEYS United States Patent 2,799,087 PIPING LENGTH MEASURING DEVICE Masazo Tango, Nuttari-machi, Niigata-shi, Japan Application November 18, 1954, SerialiNo. 469,700

1 Claim. .(Cl. 33-1) My invention relates to a piping length measuring device and has for its object to provide a pipingflength measuring device, which consists of a coordinate plate having curved graduations between coordinate axes, each of which shows the relation between the slope of the main pipeand the projection of the branch angle of a Y pipe -to thehoriz'ontal plane varyingin accordance with said slope, which is necessary for keeping .the end offthe branched pipevertical, and having graduations of length on said coordinate axes, a bend angle plate which hasthebend angle ofa bend pipe connected with the.

branchend between angle sides and having graduations 3 oflength on said angle sides, and an auxiliary scale hav-' ing a graduation of length. v p -A chiefadvantage of'the presentinvention is that by using said device anyone can easilyfmeasure the necessary piping'le'ngths for a piping system on the desk, in which the main pipe is branched by using a Y pipe and the end of a bend pipe at the branch end is kept vertical, and is most ellicient in case of said main pipe having a slope.

Other objects and advantages of this invention will be apparent from thefollowing description and from the drawings in which: 1:. i i.

Figure l-iis an elevational view of a piping system,- in which a 45 bend pipe is connected with a 45 branch Fig. 2 is. an elevational view of said pipingsystem in case that a slope is given to the main pipe and the end of said bend pipe is kept vertical;

Fig. 3 is a plan view of the above;

Fig. 4 and Fig. 5 are diagrammatic views for explanation of the principle of the invention;

Fig. 6 is a plan view of a coordinate plate;

Fig. 7 is a plan view of a 45 bend angle plate;

Fig. 8 is a plan view of an auxiliary scale;

Fig. 9 is a plan view. of the above members under usage;

Fig. 10 is an elevational sketch of a piping system; and

Fig. 11 is a plan sketch of the above.

In Fig. l, the numerals 1 and 2 denote the main pipe and the branched pipe, respectively, at which branch a Y branch pipe 3 is used, and a bend pipe 4 is used at the end of said branched pipe keeping said end vertical in order to be able to connect it with a vertical pipe. It is assumed for simplifying the explanation of my invention that a Y branch pipe of 45 branch angle, namely 45 Y is used and a bend pipe of 45 bend angle, namely 45 L or A3 bend is connected with the end of the branched portion 3' of said branch pipe.

In case of the main pipe 1 being horizontal as shown in Fig. 1, when the plane including both the axes of the Y pipe 3 and the bend pipe 4 is vertical, the end of said bend pipe is vertical, but it will of course incline if a slope is given to said main pipe. It is required to make said end vertical for the sake of connecting it with a vertical pipe, for which purpose, as shown in Figs. 2 and 3, the end of the branched portion 3' must be kept as 2,799,087 Patented July 16,1957

same in height as before by rotating the Y pipe 3 in the clockwise direction, and also, the plane including both the axes of the bend pipe 4 and the branched portion 3' must be'kept vertical by rotating said bend pipe in the counter-clockwise direction; then the projection of the branch angle to the horizontal plane, which is zero in the state shown in Fig. 1, becomes a 0 denotes the slope angle of said main pipe.

For obtaining the relation between a and 0 above stated, it is assumed that, in Fig. 4, the coordinate origin the XY plane being R, then QR must be constant and vertical.

P0 =45;POs=o;' and I ROT=u If 0 is varied .by moving OP in the YZ plane, AOQR willmove holding its vertical state and Accordingly, from the Formula A h= /h sin a+ (h cos a-h eos'0) l (hh sin 0) By solving this equation I cos 0: cos 0-l-sin 0='l A or Namely, in case of using the 45 Y and the 45 L, the slope angle 0 of the main pipe 1 and the projection on of the branch angle to the horizontal plane are in such relation as shown by this formula for keeping the end of the bend pipe 4 vertical, and therefore, for example, if the slope of said main pipe is inch, on will be obtained by means of the trigonometrical function table by inserting 0, which is obtained from said table calculating cos u=sec 0-tan 0 tan 0= into the Formula B.

In Fig. 6, the numeral 6 indicates a coordinate plate of sector shape representing the XY plane, on which coordinate axes 7 and 8 intersecting each other at the right angle and having graduations 9 and 10, respectively, for example, of one foot length are drawn. The ends of said graduations are connected quadrantally, in which range longitudinal and lateral graduation lines are drawn. Provided on the outer quadrantal part of said plate is a curved graduation 11, which is constructed by marking slopes corresponding to 0: obtained from the Formula B in case of using the 45 Y and 45 L. Similarly, other curved graduations are provided corresponding to various combinations of Y pipes and bend pipes. The numeral 12 shows a pin standing on the origin.

In Fig. 7, the numeral 13 denotes a bend angle plate of triangular shape representing AOQR and having 45, which is the bend angle of said 45 L, between angle sides 14 and 15. Provided on its oblique side 15 and varying, a, as,

perpendicular side 16 are graduations 17 and 18; respectively, in inches, and in the triangle thus formed, longitudinal and lateral graduation lines are drawn." The numeral 19 shows a hole which is made on the vertex and is to be'put' on the pin. 12- ofthe coordinate-platev 6..

In FigstS, the numeral 20 indicates an auxiliary scale having the same. graduation -21, namely in inches, as thoseof the coordinate plate 6-and'the bend angleplate. 13, and providing arhole 22 on its zero end to be put. on

the pin:12 of'said coordinate plate.

Now, as shown in Figs. 2 and 3, let the numeral 23 denote the intersection point of the axis of the branched pipe-2 and the center line of theendof the: bend pipe-4, andprovide'd that a I (1) a shows aslope of the main pipe 1; j

(2) b shows'theprojection. of said main pipe gotten (2) b appears on the coordinate axis 7 'ofth'e coordinate plate 6;

(3) c can be obtained by measuring the intersection point of the longitudinal graduation line at b on the coordinate axis 7 of the coordinate plate 6 and the angle side 14 of the bend angle plate 13 along said longitudinal graduation line with the auxiliary scale 20, after putting the hole 19 of said bend angle plate on the pin 12 of said coordinate plate and setting said angle side on the pre-determined slope a of the curved graduation 11;

(4) f can be obtained by measuring said intersection point along the angle side 14;

(5) d is the length of the longitudinal graduation line of the bend angle plate 13 at said intersection point; and

(6) e is the graduation at a point, at which said longitudinal graduation line at said intersection point intersects-the angle side 15.

Next, I will explain how to use my invented device in case that, for example, a 45 Y and a 45 9 L are used and that a and b are 1 and 7 inches, respectively, in such a piping system as shown in Figs. 10 and 11.

Putting'--the--hole 19- of thebend angle plate 13 on the pin 12 of the coordinate plate 6 and setting the angle sidl t' on the mark 1'' of thecurved graduation 1'1, 3" is obtained for c by measuring the intersection point of the longitudinal graduation line at the mark 7" on the coordinate axis 7 and said angle side along said longitudinal graduation line with the auxiliary scale 20; 7%," is obtained for f by measuring said intersection point along said angle side; 7 7 is-obtained for d by reading the graduationlS- corresponding to the longitudinal graduation line of the bend angle plate 13 at said intersection point; and 10%" is obtained for e'by reading the graduation 17 at a pointat which said longitudinal graduation line intersects the angle side 15.

Thus the device according to my invention is composed of the coordinate plate, the bend angle plate having the bend angle and the auxiliary scale, and is enabled to easily measure the necessary lengths for a piping system on the desk, in whichthe main pipe is branched by using a Y pipe and the end'of a bendpipe at the branch end is kept vertical, and is most efficient in case of said main pipe having a slope.

What I'claim is:

A piping length measuring device, which consists of a coordinate platehaving curved graduations between coordinate axes, each of which shows the relation between the'slope of the main pipe and theprojecti'on of the branch angle of a Y pipe to the horizontal plane varying, in accordance with said slope which is necessary for keeping the end of the branched pipe vertical, and having graduation's of length on said coordinate axes, a bend angle plate having the bend angle of a bend pipe connected with the branch end between angle sides and having graduations of length along one of said angle sides and another side normal to the other angle side, and an auxiliary scale having'a graduationtof length.

References Cited in the file of this patent UNITED STATES PATENTS- 886,695 Greenier -2. May 5, 1908 1,172,510 Williamson Feb. 22, 1916 1,808,981 Glass June 9, 1931 FOREIGN PATENTS 905,893 Germany "a- Mar. 8, 1954 

